Underground storage-tank installation



E. S. CORNELL. JR

UNDERGROUND STORAGE TANK INSTALLATION Mm ww/ I Aug, 2,l 1932.

Patented Aug. 2, 1932 lfgulUTSTATES PATENT OFFICEk EDWARD s. CORNELL, Jia., or WATDRTOWN, CONNECTICUT, AssIaNoia To THE CHASE COMPANIES, INCORPORATED, OF WATERBURmCONNECTICUT, A CORPORATION UNDERGROUND STORAGE-TANK INSTALLATION This invention relates to an improvement in underground storage-tank installations and particularly to vunderground fuel-oil storage-tank installations, though not so limited.

The main object of this invention is to provide an underground storage-tank installation which will insure the integrity of the pipe-connections with the tank proper despite f6 the settling of the latter.

l/Vith the above and other objects in view as will appear from the following, my invention consists in an underground storage-tank installation characterized by a storage tank I formed with an aperture; a water-tight slipjoint-fitting installed in the aperture of the said tank and provided with a through passage for the reception of a tube; and a continuous one-piece fluid-conducting tube exf2'0 tending through the said slip-fitting from the exterior to the interior of the said tank and having its periphery frictionally grippedV by the said slipefitting; whereby upon the settling of the tank, the said slip-fitting will 525 move therewith and slip over the surface of the fluid-conducting tube without' imposing a rupturing strain thereupon so that a continuous connection with the said tank is assured despite the said settling.

In the accompanying drawing:

Fig. 1 is a broken view in elevation of an underground storage-tank installation em-vr bodying my invention, the surrounding ground being shown in section and the tank `proper broke away to facilitate illustration;

and

Fig. 2 is a broken vertical central sectional view taken on the line 2-2 of Fig. 1, but on a larger scale.

For the illustration of my invention, I have herein shown only the suction or outlet-connection of an underground tank, but I'wish to have it understood that my invention is also applicable to the inlet-connec- 50 4neath the surface of the ground 11.

Application led Uetober 10,` 1930. Serial No. 487,748.

The -upper face of the periphery ofthe l tank at `is struck up to form a boss 12 formed with an internally-threaded axial. aperture 13 forthe reception of an externallythreaded bushing 14 having a hexagonal vboss 15zby means ofwhich itmay bethreaded into place. t

I The bushing :14 is Vformed with'an axial passage 16 extendingv completely through the same from t'opzto bottom and having its upper end provided with internal threads 17 to receive the `depending externally-threaded. shank 18 of a body-member 19of a slip-joint,- y fitting which may be'of any approved type, but as herein shown, the body-member 19 is formed with an axially-arranged throughpassage 20and withr an upstanding shank 21 provided with external threads22 and having its top inner corner lprovided with a bevel 23,v for co-action with the similarly-beveled under-face -24 of a compression-ring25.

-V Theiupper face of the compression-ring 25`is formed with 'a bevel 26 extending vin thev oppositev direction from the bevel 23 of its underefacev and is arranged'to be engagedv by a beveled internal annular shoulder 27 of a compression-collar 28, the skirtv 29. of which latter is formed Vwith internal threads 30 for engagement with the external threads 22 of the upstanding shank 2l of the body-member 19. f Y

Extending through the throughpassage 2O in the body-member 19 is a duid-conducting tube or pipe 31 which extends into the tank preferably to a point adjacent the bottom thereof tofunction asa suctionpipe and has its inner end provided with a strainer 32 which may be of any rapproved type.A The tube 31 also extends through the compression- 'ring 25 and through the compression-collar 28 which two latter parts together with the Y body-member 19 constitute the slip-'jointfitting. Y f I YPreferably andas hereinshown, the'tube 31 is bent to forman integral horizontal 95 reach 33, though I wish to have it understoodV that the said tube maybe of relatively-short length and have its 'respective inner and outer ends coupled to separate tubes or pipes forming a continuation thereof. 1

In assembling my improved underground tank installation, it is preferable to first sleeve the slip-joint-iitting over the tube 31 together with the bushing 14 and then apply the strainer 32 to the eXtreme lower end of the said tube. The inner end of the tube 31 carrying the strainer is now inserted through the aperture 13 in the tank and the bushing 14 screwed home. I The threaded shank 18 of the body-member 19 is threaded firmly into the bushing and the tube is adjusted vertical'ly to bring the strainer 32 the proper distance above the bottom of the tank.

The compression-collar 28 is-now screwed down upon the upstanding shank 21 of the said body-member so as to compress the com,- presson-ring 25 to a degree sufficient to cause its inner face to frictionally engage the periphery of the tube 31 to a degree suicient to ,exclude water and other foreign matter, but

topermit the fitting to slide'bodily over it in the event that the tank should settle.

a Underground storage-tank installations have heretofore occasioned considerable trou- -ble and expense for the reasonthat the settling of the. tank with respect to the pipe or pipes connected therewith has occasioned ruptures vin the pipes themselves or'in the connecting fittings requiring, more often than not, the removal of the overlying earth in order to effect repairs.

When my improved underground storagetank installation is employed, the settling of the tank 10 with respect to the horizontal reach 33 of the tube 31 which latter, it is to be remembered, Vis usually earthbound so as not `to move with the tank, the settling referred Vto merely occasions the sliding of the slip-joint-fitting over the periphery of the said tube 31 so that despite such settling, a continuous connection with the tank is assured.

It will be understoodV by those skilled inthe art that my invention may assume varied Vphysical forms without departing from my inventive concept and I, therefore, do not limit myself to the specific embodiment heirein chosen for illustration, but only as indicated in the appended claim.

I claim:

In an underground storage-tank installation, the combination with a storage tank buried beneath the surfaceof the ground andy formed with an aperture; of a water-tight slip-joint-litting installed in the aperture in Inv testimony whereof, I have signed this specification".

EDWARD s. CORNELL, JR.

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